document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=839065>Question 839065</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The cruising speed of an airplane is 320  miles per hours. With the wind the airplane can cover a certain distance in 6 hours, but against the wind it can cover only 7/8 of that distance in 6 hours. Find the velocity of the wind. \r<BR>\n" );
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document.write( "320 miles per hour= 1920 and 7/8 of that is 1680. I tried to set up the equations and got <BR>\n" );
document.write( "1920=W+speed <BR>\n" );
document.write( "1680= speed-w </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #505641 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=505641\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The cruising speed of an airplane is 320 miles per hours.<BR>\n" );
document.write( " With the wind the airplane can cover a certain distance in 6 hours, but against the wind it can cover only 7/8 of that distance in 6 hours.<BR>\n" );
document.write( " Find the velocity of the wind.<BR>\n" );
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document.write( "Let's do it this way. <BR>\n" );
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document.write( "Let w = the velocity of the wind<BR>\n" );
document.write( "then<BR>\n" );
document.write( "Original distance = 6(320+w)<BR>\n" );
document.write( "Against distance = 6(320-w)<BR>\n" );
document.write( "the equation<BR>\n" );
document.write( "6(320-w) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2F8 ALIGN=MIDDLE  ALT=\"7%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" >*6(320+w)<BR>\n" );
document.write( "divide both sides by 6<BR>\n" );
document.write( "(320-w) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2F8 ALIGN=MIDDLE  ALT=\"7%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" >*(320+w)<BR>\n" );
document.write( "multiply both sides by 8<BR>\n" );
document.write( "8(320-w) = 7(320+w)<BR>\n" );
document.write( "2560 - 8w = 2240 + 7w<BR>\n" );
document.write( "2560 - 2240 = 7w + 8W<BR>\n" );
document.write( "320 = 15w<BR>\n" );
document.write( " w = 320/15<BR>\n" );
document.write( " w = 21<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F3 ALIGN=MIDDLE  ALT=\"1%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > mph, rate of the wind<BR>\n" );
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document.write( "You can check this on a calc<BR>\n" );
document.write( "6(320+21.33) * <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2F8 ALIGN=MIDDLE  ALT=\"7%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "see if it equals<BR>\n" );
document.write( "6(320-21.333)\r<BR>\n" );
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document.write( "  </SPAN>\n" );
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